244 MUSCIDJE. 



Meigenii, Fal. Nigra, sat longa, capite antennisque basi luteis, tho- 

 racis lateribus flavis, alis subcinerascentibus, halteribus pallide flavis, 

 pedibus piceis, femoribus flavis, tibiis antice fulvis. Long. 4 IT ; alar. 



Black, shining, rather long and slender, nearly linear. Head luteous, 

 black behind, pale-yellow beneath. Antenna? black ; first and second 

 joints luteous ; third conical, terminated by a short spine. Thorax 

 elliptical ; sides yellow. Wings slightly greyish-hyaline ; veins black, 

 yellow towards the base ; cubital vein ending at "a little in front of 

 the tip of the wing ; prsebrachial ending at very little behind the tip. 

 Halteres pale-yellow. Abdomen fusiform. Legs piceous, rather long ; 

 femora yellow ; fore tibia? tawny. 



Generally distributed. (E. S. I.) Macquart has given ibis 

 species the generic name of Odontocera, on account of the spine 

 on the third joint of the antennae. 



Genus II. PHYTOMYZA. 



PHYTOMYZA, Pal. Phytomyz. (1823) ; Meig.; Mcq. ; Westw.; Zett. 



Corpus angustum, parvum vel minimum. Caput et thorax convexa, 

 subsetosa. Caput thoracis latitudine. Antenna? breves; articulus 

 tertius rotundus vel oblongus ; arista nuda aut pubescens. Thorax 

 ellipticus. Ala sat longa?; vena discalis transversa disco valde re- 

 mota prabrachiali transversa conjuncta, vel nulla. Pedes graciles. 

 Body small or very minute, rather slender, nearly linear, with a few 

 bristles. Head and thorax convex. Head as broad as the thorax. 

 Antenna? short ; first and second joints very minute ; third round or 

 oblong, arista slender, setiform, bare or pubescent. Thorax elliptical. 

 Wings rather long ; costal vein ending on the fore border at some dis- 

 tance from the tip of the wing ; subcostal ending at a little beyond 

 one-third of the length ; radial ending at a little before two-thirds of 

 the length ; cubital ending at the tip of the costal ; pra?brachial and 

 pobrachial straight, very slight, occasionally indistinct; pra?brachial 

 ending at the tip or at a little behind it ; prcebrachial transverse in a 

 line with the discal transverse, and parted by more than six times its length 

 from the border, or none. Abdomen a little narrower than the thorax, 

 with distinct segments. Legs of moderate length. Male. Abdomen 

 linear, as long as the thorax. Fern. Abdomen fusiform, or attenuated 

 towards the tip, a little longer than the thorax. 



a. Praebrachial transverse vein in a line with the discal transverse. 



Species 1. 

 a a. No pra?brachial transverse vein. 



b. Body black, or greyish-black. 



